<template>
  <el-container class="home_container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.381d6a3e.png" alt="">
        <h2>电商后台管理系统</h2>
      </div>
      <el-button type="info" @click="bowout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="tog-btn" @click="toggleCol">
          <i class="el-icon-menu"></i>
        </div>
        <!-- 侧边栏菜单区域 -->
          <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''"
                      v-for="item in menuList"
                      :key="item.id">
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="icons[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/' + childrenItem.path"
                          v-for="childrenItem in item.children"
                          :key="childrenItem.id"
                          @click="saveNavState('/' + childrenItem.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-s-help"></i>
                <!-- 文本 -->
                <span>{{childrenItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
          </el-menu>
      </el-aside>
      <!-- 右侧主题区域 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
/* eslint-disable */
export default {
  data() {
    return {
      // 左侧菜单数据
      menuList: [],
      icons: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-3702mima',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      //是否折叠
      isCollapse: false,
      //被激活的链接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('active')
  },
  methods: {
    bowout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有菜单
    async getMenuList() {
      const {data: res} = await this.$http.get('menus')
      if(res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.menuList = res.data
      console.log(res);
    },
    //点击按钮 切换菜单的折叠与展开
    toggleCol() {
      this.isCollapse = !this.isCollapse
    },
    //保存链接激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('active', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home_container {
  height: 100%;
}
.el-header {
  display: flex;
  background-color: #373d41;
  justify-content: space-between;
  align-items: center;
  padding-left: 0;
  color: #fff;
  text-shadow: 2px 2px 2px rgba(255, 255, 255, 0.5);
  > div {
    display: flex;
    align-items: center;
    margin-left: 10px;
    cursor: pointer;
    > img {
      width: 32px;
      height: 32px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  font-size: 16px;
  margin-right: 10px;
}
.tog-btn {
  background-color: #4a5064;
  font-size: 14px;
  line-height: 24px;
  text-align: center;
  color: #fff;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
